diff --git a/Commands.md b/Commands.md
index 7e3a166..552f950 100644
--- a/Commands.md
+++ b/Commands.md
@@ -15,6 +15,10 @@
 * `/dynmap radiusrender radius`: attempts to render at least a `radius` block area, centered on your current location.
 * `/dynmap radiusrender radius mapname`: attempts to render at least a `radius` block area, centered on your current location of map 'mapname'
 * `/dynmap radiusrender world x z radius`: attempts to render at least a `radius` block area, centered on 'x,64,z' on world 'world'.
+* `/dynmap updaterender`: attempts to render tiles needing updating, starting at current location, for all maps.  Stops at edge of map and at tiles that don't need updating.
+* `/dynmap updaterender mapname`: attempts to render tiles needing updating, starting at current location, for given map.  Stops at edge of map and at tiles that don't need updating.
+* `/dynmap updaterender world x z`: attempts to render tiles needing updating, starting at given location <x,z> on given world, for all maps.  Stops at edge of map and at tiles that don't need updating.
+* `/dynmap updaterender world x z mapname`: attempts to render tiles needing updating, starting at given location <x,z> on given world, for given map.  Stops at edge of map and at tiles that don't need updating.
 * `/dynmap cancelrender world`: cancels any active fullrender or radiusrender on the given world.
 * `/dynmap purgequeue`: clears the tile update queue
 
@@ -79,6 +83,7 @@ Permissions-based access control is currently supported, and the following nodes
 * `dynmap.hide.others` - allows /dynmap hide <player>
 * `dynmap.fullrender` - allows /dynmap fullrender or /dynmap fullrender <world>
 * `dynmap.radiusrender` - allows /dynmap radiusrender
+* `dynmap.updaterender` - allows /dynmap updaterender
 * `dynmap.cancelrender` - allows /dynmap cancelrender <world>
 * `dynmap.reload` - allows /dynmap reload
 * `dynmap.stats` - allows /dynmap stats or /dynmap stats <world> or /dynmap triggerstats